Howell, A. R. (1974). Study of the exposure to noise of operators of mechanical logging equipment in British Columbia. Canadian Forestry Service, Department of Environment.
Dyfyniad Arddull ChicagoHowell, A. R. Study of the Exposure to Noise of Operators of Mechanical Logging Equipment in British Columbia. Ottawa: Canadian Forestry Service, Department of Environment, 1974.
Dyfyniad MLAHowell, A. R. Study of the Exposure to Noise of Operators of Mechanical Logging Equipment in British Columbia. Canadian Forestry Service, Department of Environment, 1974.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.
